Comment on "Time modulation of the K-shell electron capture decay rates of H-like heavy ions at GSI experiments", arXiv:0908.0877

TL;DR

This paper critically evaluates proposed explanations for observed decay rate modulations in H-like heavy ions, arguing that existing theories are insufficient and exploring alternative possibilities for the phenomenon.

Contribution

It provides a critical analysis of existing explanations for decay rate modulation and discusses potential alternative mechanisms.

Findings

Existing explanations are not satisfactory

Neutrino oscillations do not fully account for the modulation

Other mechanisms may be responsible for the observed effects

Abstract

According to GSI experiment Phys.Lett.B 664, 162 (2008), the rate of the daughter ion production by the K-shell electron capture (with neutrino emission) in H-like ions 142Pm, 140Pr and 152I is modulated with a period of 6 to 7 seconds. In PRL 103, 062502, 2009 by Ivanov and Kienle (also by Lipkin}) there is a claim that neutrino oscillations may explain this result. In arXiv:0811.2302 by Lambiase et al a different explanation is suggested which is based on the rotation of electron and nuclear spins. The aim of this Comment is to show why these explanations are not satisfactory and to discuss other possibilities.